Machine for repairing scores in cylinders



C. HOPPER Nov. 11 I924.

MACHINE FOR REPAIRING SCORES IN CYLINDERS Filed Feb. 21 192) Patented Nov. 11, 1924 CHARLES HOPPER, OF LOS .ANGELES, CALIFORNIA.

MACHINE FOR REPAIRING SCORES IN CYLINDERS.

Application filed February 21, 1921. Serial No. 446,540.

To all whom it may concern:

Be it known that L CHARLES HOPPER, a citizen of the United States, residing at Los Angeles. in the county of Los Angeles and State of California, have invented new and useful Improvements in a Machine for Repairing Scores in Cylinders, of which the following is a specification.

This invention relates to a machine which is especially adapted for use in making repairs on the inner surfaces of cylinders of internal combustion engines, steam engines, air compressors, pumps, and the like, and particularly for forming grooves or channels on the interior of a hollow object to receive metal inlays.

An object of my invent-ion .is to provide a means for advancing and retracting a tool interiorly of a cylinder or the like, raising or lowering the tool, moving the tool transversely, and adjusting the tool around a horizontal axis whereby the tool may be disposed to cut into the inner periphery of a cylinder wall at any point within the cylinder either on a plane extending radially of the cylinder or parallel'to the radius, or a plane extending obliquely to the radius thereof.

Another object is to provide a mounting for a tool supporting stem by which the stem may be rigidly supported in a horizontal position and adjusted longitudinally and circumferentially relative to the mounting whereby the stem may be lengthened or shortened and turned around its axis to various positions.

A further object is to provide a means whereby a shaft extending. longitudinally through the stem above referred to may be rotated and power driven from a motor fixedly mounted relative to the stem mounting, irrespective of the longitudinally adjusted position of the stem.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of the machine.

Figure 2 is a view in vertical section with parts shown in front elevation.

Figure 8 is partially avhorizontal section and partially a plan view of a detail hereinafter described.

Figure 4 is a view in transverse section as seen on the line 44 of Figure 2.

.here shown as formed with an opening tion is especially designed to make.

More specifically, 6 indicates a standard which may be of any suitable construction and is here shown as consisting of a vertically disposed plate adapted to carry or be disposed adjacent to the open end of the cyl inder to be worked upon; the plate being through which the open end of the cylinder may be exposed.

Mounted on the front of the standard 6 is a vertical guide-way 8 in which a slide 9 is mounted for vertical adjustment, and which slide is formed with a horizontally extending bed 10 formed with a longitudinal dove-tail guide 11 on its upper face on which a carriage 12 is adjustably mounted. A bracket 13 is formed on the carriage 12 extending at right angles to the latter, and formed on the carriage and bracket is a longitudinal dove-tail guide 14 on which a slide block 15 is mounted for horizontal adjustment; the carriage .12 and block15 being thus adapted to move on a horizontal plane at right angles to each other'and may be disposed at various levels by vertical adjustment of the bed 10.

Any suitable means may be employed for adjusting. the position of the bed, carriage and slide block; the adjustment of the bed being here shown as effected bymeans of a vertical screw 16 carried by the slide 9 and threaded into a bearing 17 on the standard, which screw is adapted to be rotated through a horizontal shaft 18 carried by the bed 10 having a pinion 19 on its inner end meshing with a bevel pinion 20 on the screw 16. The adjustment of the carriage 12 may be effected by a screw shaft 21 arranged in a longitudinal channel in the bedand having threaded connection in a lug'22 on the carriage. The outer ends of'the shafts 18' and 21 extend beyond the outer end of the bed and may be fitted with suitable handles by which they may be manually rotated to effect vertical adjustment of the bed and horizontal adjustment of the carriage longitudinally of the bed. A threaded shaft 23 is mounted on thecarriage l2 and has screw engagement with a lug 24 on the slide block 15 in such manner that on rotation of the shaft 23 the block 15 will be shifted longitudinally on the guide 14 trai'rsversely of the bed '10. The shaft 23 is provided with a handle 25 by which it may be manually rotated. The several adjustable elements just described are those commonly employed on lathes, but any suitable means for vary ing the positions of these parts may be employed as occasion may require.

An important -feature of the present inven e sides in a insane for supporting a horizontally extending 001 carrying stem 26 relative "to "the slide block 15, so that the stem will eiitend si'ib'stantially parallel with the bed 10 withitsdther end adapted to be positioned to as th'rough'the opening 7 on the stahd'ard, andso 'tha-tfthe stein 'will be moved "in the di're(':t ion of its length on advancing or retracting 'the carriage '12 and whereby the stem may be adjusted longitudinally and circumferential'ly in its support. This means is here shown as embodying a clamp sleeve 27 which is rigidly and station rily mounted on a bracket 28 formed 011 t "e'sl i'de block 'l5,'and which clamp sleeve extends "transversely of the slide bloc]; and

at *r-i 1t angles to the direction of movementor the latter. The site-11126 is formed with a series of longitudinal "serrations ;29 which e tend throughout a portion r the lengthot the stem from its inner end, and the clai'ripfsleeve'is formed with corresponding internal'serra tions adapted to interengage the serrations on the stem so that when the stem is clan'iped in the sleeie it will be securely held against rotation, The clamp sleeve isfformed with a pair of side flanges 30 and '31 on opposite sides of 'a split 32 which flanges are connected together by screws33.

Mounted in suitablebearings in the stem is as'hait 34, the outer end 0'1 which is fitted witha 'bevel gear "35 meshing with a corresponding gear 36 on a chuck 37 extending at an angle to thesha ftand adapted to receive a tool to be rotated. The inner end of the shaft projects from the stein-and is fitted with a. pulley 38 which comprises a cylinder open at one end and having an end wall formed with a hub 39 having an opening'to receive thes'haft and provided with a set screw 40; the cylinder being adapted to be disposedto telescope the inner end of the stem 26 in a position reversed to that shown in Figure 3, of the drawings as indicated in dotted lines. The 'ou'ierperiphery of the pulley is formed with a series of circumferential channels 42 to receive'a 'belt '43'passing over a pulley 44: on "the drive of a motor i5,'which motor is carried on the bracket 28. v The pulley 38 aiiords "means whereby a driving connection maybe effected between the motor and sh aItt'S L irrespective of the various adjusted {positions of the stem 26, as the ,pulley may be disposed 'to project beyond the end of the shaft 34; or to telescope over the end of the stem so as to position one of the channels "mounted in any suitable manner rearward of the standard to expose an open portion thereof through "theopening 7, so that the end of the stem and the tool thereon may be passed through the opening "7 and positioned interiorly of the object; the vertical and horizontal positions of the stem and tool relative to the surface to be worked being obtained by vertical adjustment of the slide 9 and horizontal adjustment of the slide block 15 before described.

The tool may be adjusted to attack the wall of the object in any direction radially of the stem by turning the stem to the desired circumferential position, which is ef- I iected by loosening the clamp sleeve and shifting the stem lengthwise to withdraw the serrations of the stem free from those oi the sleeve and positioning the unserrated portion of the stem adjacent 'to its outer end within the "sleeve the-n turning the stem to extend the tool in "the desired direction, reengaging the serrated portion of the stem with the sleeve, and clamping the sleeve on the stem. stem may be adjusted by loosening the clamp sleeve and shifting the stem lengthwise; it being desirable that the projecting portion of the stem be as short as the point of operation in the work will permit, so as to minimize vibration.

By mounting the stem 26 so that it maybe turned to various positions around its axis,

the tool on the stem may be disposed toextend in any desired direction on a vertical plane so that the tool may be disposed to operatoat any desired point around the interior of a cylinder 'andcut into the cylinder wall on a plane either in alignment with or spa allel to the radius of the cylinder or on a plane in diagonal relation the radius of the cylinder as the occasion may require.

The machine is especially designed for use in repairing the scores in'the cylinders of internal combustion engines, which scores are shallow grooves cut in the cylinder walls, ordinarily because 01" some defect in 'the engine piston, and which grooves extend longitudinally oi the cylinder. Inc-fleeting a, repair of the cylinder by the use of this machine the material of the cylinder wall adjacent the score is cut away to form a. gl'OOVO of such depth and shape that an inlay of metal may be secured therein.

In cutting a-groove or channel on the inner wall of a cylinder, as in the repair oi? scores in engine cylinders, the "groove is preferably formed as indicated at kit in F ure 5, that is, with inclined'side walls 47 and a bottom wall formed with recessed portions The length of projection of the walls. These grooves are usually formed by arranging a cylinder to be worked rearward of the standard with the scored portion to be removed located at the lowest point. The stem 26 carrying a cutting tool extending at right angles to the stem. is inserted longitudinally into the cylinder parallel to the longitudinal axis of the latter, and parallel to the score in the cylinder wall. The stem is then turned in the sleeve 27, and adjusted to the desired circumferential .position according to the angle of attack of the tool. The bed 10 is then lowered to bring the tool into operative engagement with the cylinder wall, and the shaft 34: is rotated to drive the tool. The depth of penetration of the tool is regulated by vertical adjustment of the table 1.0. The shaft 21 is then manually rotated to advance the carriage l2, and thereby causes the tool to advance in the cylinder longitudinally thereof, so that the tool will cut a recess in the wall of the cylinder as it advances. The plane of attack of the'tool is adjusted by turning the stem 26 in the sleeve 27 as before described, or by adjusting the carriage 15, for example, if it is desired that the tool enter the cylinder wall on a radial plane, the stem 26 will be positioned on a plane extending from the score diametrically through the cylinder. If it is desired that the tool operate on a plane to either side of the radius and parallel thereto, the carriage 15 is shifted to move the stem 26 horizontally to the desired position. W hen the tool is to operate on a plane obliquely to the radius of the cylinder, the stem 26 is positioned to one side of the axis of the cylinder as would be its normal position in the case of an engine cylinder, and the stem turned to dispose the tool at an angle tothe plane of the radius on which the stem is located.

An important feature of this invention resides in a splined engagement of the stem 26 throughout the length of the sleeve 27 and throughout the periphery of the stem whereby the stem will be securely held against possibility its being accidentally thrown out of an adjusted position.

I claim:

1. In a machine of the character described, a tool carrying stem, a clamp sleeve encircling said stem in engagement therewith substantially throughout the periphery of the stem and splined thereto for supporting said stem in which the stem is longitudinally and circumferentially adjustable, a slidable bracket on which said clamp sleeve is fixedly mounted, a motor carried by said bracket, a tool driving shaft in said stem, and means for rotating said shaftfrom said motor.

2. In a machine for the purpose set forth, a tubular stem formed with a series of longitudinal serrations,a clamp sleeve encircling said stem having internal serrations adapted to interengage the serrations on the stem, an adjustable supporting member on which said clamp sleeve is mounted, a shaft in said stem, and a motor driving said shaft.

3. In a machine for forming channels interiorly of hollow objects, a stem adapted to be inserted in the object, a tool carried by said stem and extending at an angle thereto and adapted to operate on the inner surface of the object, a sleeve encircling said stem in which the stem is longitudinally adjustable for varying the length of projection of said stem from said sleeve, a supporton which said sleeve is stationarily mounted, means whereby said support may be adjusted vertically, means whereby the support may be adjusted to shift the stem transversely, and means whereby the support may be advanced and retracted to move the stem longitudinally.

4. A machine for repairing scored cylinders, comprising a standard, a horizontal bed adjustable vertically on said standard, a carriage slidable longitudinally of said bed, a block slidable transversely of said carriage, a stem mounted on said block and projecting fixedly therefrom with its longitudinal axis extending in the direction of movement of the carriage, said stem being adapted to be adjusted longitudinally on said block and to be turned axially to various positions.

5. A machine for repairing scored cylinders, comprising a standard, a horizontal bed adjustable vertically on said standard, a carriage slidable longitudinally of said bed, a block slidable transversely of said carriage, a stem mounted on said block and projecting fixedly therefrom with its longitudinal axis extending in the direction of movement of the carriage, said stem being adapted to be adjusted longitudinally on said block and to be turned axially to various positions, a shaft in said stem, a tool on said stem operatively connected to said stem, a motor carried by said block, and means whereby said shaft may be rotated from said motor irrespective of the longitudinally adjusted position of said sleeve.

6. In a machine of the character described, a stem, a bearing in which said stem is mounted and adapted to be adjusted longitudinally and circumferentially, a support on which said bearing is stationarily mounted, a shaft carried by said stem, a motor carried by said support, a pulley adjustably mounted on said stem having a plurality of peripheral belt receiving channels and formed with an end recess whereby the pulley may be telescoped with the stem, and a driving connection between said motor and said pulley.

7. In a machine for forming channels interi'orly of hollow object, a stem adapted to be inserted in the object, a tool carried by said stem and extending; at an angle thereto and adapted to operate on the inner surface of the object, a supporton which said stem is stationarily mounted and from Which the stem projects horizontally, means whereby said stein may be disposed and fixed about its axis in various positions relative to the support, and means whereby the support may be advanced and retracted to move the stem longitudinally.

8. In a machine for forming channels interiorly of a hollow object, a stem adapted to be inserted in the object, a tool carried by said stem and extending at an angle tive to the support, means whereby said support may be adjus d vertically with the stem maintained h Yizontel, and means whereby the support may be advanced and retracted to move the stem longitudinally.

CHAR-LES HOPPER. 

